Title :
Investigations of even-order harmonic susceptibilities of MgB2 superconductors using critical state approach
Author :
Gencer, A. ; Güçlü, N. ; Yilmaz, Hamza ; Kilic, Alp ; Askerzade, I.N. ; Aksu, E. ; Hascicek, Y.S.
Author_Institution :
Dept. of Phys., Ankara Univ., Turkey
fDate :
6/1/2003 12:00:00 AM
Abstract :
Even-order harmonic susceptibilities χn=χn´+iχn´´ (n is even) of MgB2 were measured at temperatures between 15 and 45 K with small ac and dc field combinations. The simplified Kim model was employed to account for the main features of the experiments by use of a fitting equation Hp=Hα(1-t)β for temperature scaling. The experiments are in qualitative agreement with theory.
Keywords :
high-temperature superconductors; magnesium compounds; magnetic susceptibility; penetration depth (superconductivity); 15 to 45 K; Kim model; MgB2; MgB2 superconductor; critical state model; even-order harmonic susceptibility; penetration field; temperature scaling; Bean model; Equations; Magnetic field measurement; Magnetic susceptibility; Magnetization; Powders; Superconducting materials; Superconductivity; Temperature measurement; Type II superconductors;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2003.812383
